Amazon Step Functions API Rules

# authorship: generated by API Evangelist tooling. Stamped 2026-08-18
# on the file's own generator header (roadmap#64). An unmarked file is
# NOT assumed to be ours -- absence of evidence was never stamped.
x-method: generated
# amazon-step-functions — Spectral ruleset (strengthened)
# Plain Spectral. Existing hand-authored rules preserved; measured rules added
# from this provider's own OpenAPI conventions by strengthen_ruleset.py,
# then self-validated against the spec.
#
# Provenance:
#   - servers-https-only: 60% of servers already https (warn)
#   - query-params-casing: camel @ 100% (n=10)
#   - operationid-casing: pascal @ 77% (n=44)
#   - schema-names-casing: pascal @ 99% (n=219)
#   - schema-properties-casing: camel @ 62% (n=446)
#   - security: global (root) — NOT emitting operation-security-required
#   - error-schema-defined: SensitiveError
#   - pagination params observed: ['maxResults', 'nextToken']
#   - merge: kept 19 existing, added 6 measured, upgraded 0
#   - added: servers-https-only, query-params-casing, schema-names-casing, schema-properties-casing, security-schemes-defined, error-schema-defined
extends:
  - spectral:oas
rules:
  info-title-prefix:
    description: API title must start with "Amazon" or "AWS"
    severity: warn
    given: $.info.title
    then:
      function: pattern
      functionOptions:
        match: '^(Amazon|AWS) '
  info-description-required:
    description: Info object must have a description
    severity: error
    given: $.info
    then:
      field: description
      function: truthy
  info-version-required:
    description: Info object must have a version
    severity: error
    given: $.info
    then:
      field: version
      function: truthy
  openapi-version:
    description: Must use OpenAPI 3.x
    severity: error
    given: $
    then:
      field: openapi
      function: pattern
      functionOptions:
        match: ^3\.
  servers-required:
    description: Servers must be defined
    severity: error
    given: $
    then:
      field: servers
      function: truthy
  operation-summary-required:
    description: Every operation must have a summary
    severity: error
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: summary
      function: truthy
  operation-summary-amazon-prefix:
    description: Operation summary must start with "Amazon" or "AWS"
    severity: warn
    given: $.paths[*][get,post,put,delete,patch].summary
    then:
      function: pattern
      functionOptions:
        match: '^(Amazon|AWS) '
  operation-description-required:
    description: Every operation must have a description
    severity: warn
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: description
      function: truthy
  operation-id-required:
    description: Every operation must have an operationId
    severity: error
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: operationId
      function: truthy
  operation-id-pascal-case:
    description: OperationId must use PascalCase
    severity: warn
    given: $.paths[*][get,post,put,delete,patch].operationId
    then:
      function: pattern
      functionOptions:
        match: ^[A-Z][a-zA-Z0-9]+$
  operation-tags-required:
    description: Every operation must have tags
    severity: warn
    given: $.paths[*][get,post,put,delete,patch]
    then:
      field: tags
      function: truthy
  parameter-description-required:
    description: Every parameter must have a description
    severity: warn
    given: $.paths[*][get,post,put,delete,patch].parameters[*]
    then:
      field: description
      function: truthy
  response-success-required:
    description: Every operation must have a 2xx or 200 response
    severity: error
    given: $.paths[*][get,post,put,delete,patch].responses
    then:
      function: schema
      functionOptions:
        schema:
          type: object
          anyOf:
          - required:
            - '200'
          - required:
            - '201'
          - required:
            - '204'
  response-description-required:
    description: Every response must have a description
    severity: error
    given: $.paths[*][get,post,put,delete,patch].responses[*]
    then:
      field: description
      function: truthy
  schema-description-on-objects:
    description: Object schemas should have descriptions
    severity: info
    given: $.components.schemas[?(@.type == 'object')]
    then:
      field: description
      function: truthy
  security-schemes-defined:
    description: Security schemes should be defined in components.
    severity: warn
    given: $.components
    then:
      field: securitySchemes
      function: truthy
  get-no-request-body:
    description: GET operations must not have a request body
    severity: error
    given: $.paths[*].get
    then:
      field: requestBody
      function: falsy
  no-empty-descriptions:
    description: Descriptions must not be empty strings
    severity: error
    given: $..description
    then:
      function: pattern
      functionOptions:
        match: .+
  tags-title-case:
    description: Tags should use Title Case
    severity: warn
    given: $.tags[*].name
    then:
      function: pattern
      functionOptions:
        match: ^[A-Z][a-zA-Z0-9 ]+$
  servers-https-only:
    description: Server URLs must use HTTPS.
    severity: warn
    given: $.servers[*].url
    then:
      function: pattern
      functionOptions:
        match: ^https://
  query-params-casing:
    description: Query parameters should be camelCase (the dominant convention in this API).
    severity: warn
    given: $.paths[*][get,post,put,patch,delete].parameters[?(@.in=='query')]
    then:
      field: name
      function: casing
      functionOptions:
        type: camel
  schema-names-casing:
    description: Component schema names should be PascalCase (the dominant convention in this API).
    severity: warn
    given: $.components.schemas
    then:
      field: '@key'
      function: casing
      functionOptions:
        type: pascal
  schema-properties-casing:
    description: Schema properties should be camelCase (the dominant convention in this API).
    severity: info
    given: $.components.schemas[*].properties
    then:
      field: '@key'
      function: pattern
      functionOptions:
        match: ^[a-z][A-Za-z0-9]*$
  error-schema-defined:
    description: A shared error schema (SensitiveError) should be defined for error payloads.
    severity: warn
    given: $.components.schemas
    then:
      field: SensitiveError
      function: truthy